Abstract: Phosphorus (P) and nitrogen (N) are known to be the primary nutrients that, in excessive amounts, pollute surface waters such as streams, rivers, lakes and lagoons.pH, temperature, salinity and Electrical Conductivity (EC) were measured in situ. Ammonium (NH4+), nitrite (NO2-), nitrate (NO3-) and orthophosphate (PO43-) concentrations were determined in waters collected from ten (10) selected stationsto assess the water quality in Bolo River, Niouniourou River and Fresco Lagoon. The Redfield (N:P) ratios were also calculated.Average and standard deviation of pH, temperature, salinity, Electrical Conductivity and Total Dissolved Solids (TDS) were
Keywords: Ammonium, nitrite, nitrate, phosphate, N:P ratio; Fresco Lagoon; Côte d'Ivoire
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